# CASA Space Frame 3D vs Sketch Viewer UP

The clearest difference is review sentiment: CASA Space Frame 3D at 100% against Sketch Viewer UP's 0%. CASA Space Frame 3D also leads on rating (4.0 vs 1.6) and in-app purchases (none vs 3). Sketch Viewer UP's advantage is price (Free vs $299.99) and update cadence (every 8 days vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

Sketch Viewer UP is free to download; CASA Space Frame 3D costs $299.99 up front. Sketch Viewer UP sells 3 one-off in-app purchases. CASA Space Frame 3D asks for nothing beyond the download.

CASA Space Frame 3D holds the better App Store score, 4.0 against 1.6. That said, the two scores are not equally well evidenced: Sketch Viewer UP has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of CASA Space Frame 3D's written reviews are positive against 0% of Sketch Viewer UP's.

CASA Space Frame 3D ships an update every 3 months, Sketch Viewer UP every 8 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CASA Space Frame 3D | Sketch Viewer UP |
| --- | --- | --- |
| Price | $299.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/casa-space-frame-3d/id371089612/reviews)** | [1.6 (10 ratings)](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 40 MB |
| Requires iOS | 14.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Intesym Ltd.](https://appshunter.io/developer/361434891) | [骁宇 陈](https://appshunter.io/developer/1836429187) |

## What reviewers say

### CASA Space Frame 3D

[App page](https://appshunter.io/ios/app/casa-space-frame-3d/id371089612)

This app enables structural engineers to perform static and dynamic elastic analysis of 3D space-frames. It offers quick and precise modeling with graphical interaction, providing numerical and graphical results for deflections, forces, and mode shapes.

**Highlights:** Linear static analysis, Non-linear static analysis (P-Delta), Dynamic analysis (natural modes, footfall), Extensive section and material libraries, Graphical interactive results, Metric & imperial units

**In-app purchases:** none


### Sketch Viewer UP

[App page](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214)

This application allows users to import and view 3D models from various professional design software. It supports a wide range of file formats, making it convenient for designers, engineers, and students to access and analyze 3D drawings on their mobile devices.

**Highlights:** Import and view 3D drawings, Supports multiple professional 3D file formats, Collection of standard industry libraries, Mobile 3D viewing software, Professional CAD drawing and modeling

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一季度会员 | $9.99 | one-time |
| 一年会员 | $24.99 | one-time |
| 永久会员 | $29.99 | one-time |


## Frequently asked questions

### Is CASA Space Frame 3D free?

CASA Space Frame 3D costs $299.99, with no in-app purchases.

### Is Sketch Viewer UP free?

Sketch Viewer UP is free to download, with in-app purchases available.

### Which has better reviews, CASA Space Frame 3D or Sketch Viewer UP?

CASA Space Frame 3D is rated higher. CASA Space Frame 3D averages 4.0 out of 5 from 1 ratings, while Sketch Viewer UP averages 1.6 from 10 ratings.

### Do CASA Space Frame 3D or Sketch Viewer UP have ads?

Neither CASA Space Frame 3D nor Sketch Viewer UP shows ads.

### Which is updated more often, CASA Space Frame 3D or Sketch Viewer UP?

CASA Space Frame 3D ships an update every 3 months, and Sketch Viewer UP every 8 days. Most recently, CASA Space Frame 3D was updated on October 23, 2026 and Sketch Viewer UP on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*